Mac OS

Minecraft eventually freezes and the computer has to be rebooted. The ESC key is not recognized nor is the cmd opt esc key sequence recognized.

The video starts to get sluggish, response to key/mouse inputs slows and it ultimately just freezes with no response to anything. I have reloaded Minecraft several times, Apple checked the hardware on one of the computers, reloaded system software but i stll get the same problems.

I did not see anything in bugs etc that reports the same problem,

Model Name: iMac
Model Identifier: iMac11,1
Processor Name: Intel Core i5
Processor Speed: 2.66 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 12 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: IM111.0034.B02
SMC Version (system): 1.54f36
Serial Number (system): W89450TJ5PJ
Hardware UUID: 0F590CD3-B06F-5B58-8FC8-FD8231F5F4D5